Speed-indicator



(No Mdel.)

W. LANG.

SPEED INDIGATOE.

`1\To.268,10'7. Patented Nov. 28, 1882.

WITNESSBS INVBNTOR 4 ATTORNEY N. PETERS, Phow-Lnhugmphur. wnmmgxnn. uc.

rUNITED` STATES PATENT OFFICE.

WILLIAM LANG, OF BROOKLYN, NEW YORK.

SPEED-INDICATOR.

SPECIFICATION forming part of Letters Patent No. 268,107, dated November 28, 1882.

lApplication filed September 1I, 1882.

(No model.)

To all whom it may concern:

Be it known that I, WILLIAM LANG, of Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvements in Speed-Indicators, of which the following is aspecification.

This invention has reference to au improved speed-indicator that can be used with equal advantage for measuring the speed of shafts rotating toward the right or left; and the invention consists of a speed-indicator the spindle of which is extended in both directions and provided 'with sharp points at both ends,

it being retained in its bearings by a screw or other device that engages an annular groove of the spindle. Adetachable handleis adapted to be locked to either bearing, so as to apply the spindle to a shaft rotating in either direction and counting the number of rotations on a suitable registering mechanism.

In the accompanying drawings, Figure l represents a top View ot' my improved speedindicator with parts broken away. Fig. 2 is a vertical longitudinal section on line x rc, Fig. 1; and Fig. 3 is an end view of the device, partly in section.

Similar letters of reference indicate corresponding parts.

In the drawings, A represents the supporting-frame of my improved speed-indicator. The frame A is provided with sleeve-shaped bearings a a for the spindle B, 'which is eX- tended through both bearings and provided at each end with a sharp point, so as to form a double spindle, which can be used Afor counting the revolutions of shafts turning in either direction. The doublespindleB is retainedin the bearings a a by a yoke-shaped piece, b, which is Vattached by a screw to one of the llJearings a, said yoke engaging an annular groove, b, of" the spindle, as shown in Fig. 3.

A detachable handle, C, having a socketshaped portion is adapted to be placed over either end of the spindle and to be locked by a recess, d, to a fixed pin, d', of the bearings. In place of the pin d and recess d, any other equivalent fastening device may be used by which the handle is applied to either bearing a.

The spindle lB is provided intermediately between the bearings a a with the usual wormgear, which engages an intermeshing gearwheel, D, that is provided at one point of its circumference with a projecting pin, j', for engaging a second gear-wheel, D, that is supported above the gear-wheel D on a raised portion of the frame A. The gear-wheels D D turn on liXed center pivots, g g, attached to the frame A, to which the index-hands 7L It are rigidly secured. The face of the gearwheels D D is graduated, whereby no cover is required, the number of revolutions of the wheels being read off directly by their positions towards the index-hands. The frame A is iianged as far as it extends around the gearwheels D D', so as to protect the same and prevent interference by exterior obstructions. The gear-wheel D is engaged by a spring checkpawl, g2, that retains the gear-wheel D untilV the pressure of the pin j" of the gear-wheel D on one of the teeth of the gear-wheel D overcomes the pressure of the spring and allows the gear-wheel D to move forward over one tooth.

The speed-indicating device is applied, in the usual manner, to the shaft after both gearwheels D D have been set with theirzero-points to the index-hands, which is readily accomplished by turning the gear-wheel D by the spindle and the gear-wheel D' by the ngers. The revolutions of the shaft within a given time are then read oftl by the relative positions of the gear-wheels to the fixed index-hands.

By the use of the double spindle and detachable handle the registering device is used in the same manner for counting the revolutions of shafts revolving toward the right or toward theleft, which is more convenient than the speed-indicators heretoforein use, in which the number indicated by the index-hands had to be subtracted from the units of the total number of teeth into which the gear-wheels were divided, when the speed-indicator had to be used for counting the revolutions of a shaft runningin an opposite direction to that forv which the device was specially constructed.

Having th us described my invention, I claim as new and desire to secure by Letters Patentl. In a speed-indicator, the combination of a supporting-frame, A, having bearings a a, a double spindle, B, retained, by suitable means, in the spindle-bearings and pointed at both ends, a detachable socket-handle, C, and'means ICO n for attaching the same to either spindle-bean In testimony that I claim the foregoing as ing7 substantially as specified. my invention I have signed my name in the 2. The combination of a. supporting-frame, presence ot' two subscribing Witnesses. A, having spindle-bearings a a and means 5 for retaining the spindle, a double spindle, B, WILLIAM LANG.

pointed at both ends, a registering device, D

D', operated by a Worm-wheel 0f the spindle, Witnesses:

a detachable socket-handle, C, and means PAUL GOEPEL,

whereby the handle may he secured to either SIDNEY MANN.,

1o one ofthe bearings,substnntia1ly as specified. 

